High Frequency Flux Modulation for Electric Machines

Abstract

Electric machines typically involve a rotating magnetic field which, via the number of poles, links the mechanical speed of the machine to the electrical frequency. This paper discusses a high frequency modulation that involves fast flipping or reversals of the magnetic field superimposed on its rotation. The concept has similarities to solid-state transformers (SST) where the magnetics are operated at a higher frequency than the system frequency. A proof-of-concept low power prototype has been built and tested.